There is a really great company here in Calgary called Nurse Next Door - our purpose is to help seniors (and their families) live safe, independant and with dignity in their own homes (where ever that might be)... Give them a call if you need some help/guidence...
Plus one of the owners is a really great guy!!!
Seriously though, it isn't an easy situation to be in, we deal with people everyday that are at the end of their ropes... Overtime more and more of us are going to be dealing with it in some shape or form - don't wait for it to start thinking what you are going to do - talk to your parents now and set the stage for later, you'll be glad you did... Feel free to PM me as well and we can talk about how we can help...